A Study on Corrosion Behavior of Cr-Al-N Coatings Deposited by Reactive Magnetron Sputtering

作     者：Shuwang Duo1 Ming Zhu2 Meishuan Li3 1 Jiangxi Key Laboratory of Surface Engineering Jiangxi Normal University of Science & Technology Nanchang 330013 China 2 Dept.of Material Science and Engineering Xi’an University of Science & Technology Xi’an 710054 China 3 Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China 

会议名称：《Fifth International Conference on Surface Engineering》

会议日期：2007年

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

关 键 词：Magnetron sputtering Cr-Al-N coatings Corrosion behavior 

摘      要：CrN and Cr-Al-N coatings were deposited on glass substrate and the corrosion behavior of them was *** electrochemical tests using both DC（polarization curves） and AC techniques（EIS） were carried out on Potentiostat/Galvanstat（EG＆G） in the 3.5 wt% NaCl *** surface morphologies of the Cr-Al-N coatings with different aluminum content after corrosion tests were no obvious differentiations of the morphologies between pre-corrosion and after-corrosion except that spallation was observed on the surface of the CrN *** being immersed into NaCl solution for 1 hour,the mass of the coating kept constant with the time *** can be explained by the passivation of the *** comparison between Ecorr for the Cr-Al-N coatings with different aluminum content revealed that the corrosion potentials for the aluminum contain coatings were nobler than that for CrN *** meant that the addition of aluminum shifted Ecorr to more positive potential *** these coatings,CrN in NaCl solution exhibited the worst corrosion resistance,while the corrosion resistance of Cr0.63Al0.37N in NaCl solution was the *** polarization data and EIS data suggest that addition of aluminum can improve the corrosion resistance of CrN coating.